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Old 03-08-2008, 07:49 AM   #1
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How to disassemble (and repair) my Marble Mouse?

Hi all (and mad shoutz to old friends, teh jonaskoelker is back).

On returning from a week of (plane) travel, where I brought my Marble Mouse, I've discovered that the left button is erratic. It sometimes discards up and down events on that button, and when I press the button the click-sound is different from the right button.

I want to take apart my marble mouse to see what's going on. So far, I've taken out the four screws in the bottom. When I try to pull the case from the main body, it feels like it's attached with something I don't want to break.

I can create a small gap by pulling hard enough, and poking near the broken button seems to fix it temporarily, but I don't want to periodically have to jam a screwdriver into my trackball.

My google searches gave me a deleted Yahoo! Anwsers thread, and one dude saying "just unscrew the four screws and you're fine". -5 Insightless .

How do I take apart my Marble Mouse? How can I repair it in some other way?
Old 03-09-2008, 01:43 AM   #2
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Most of those things are assembled never to be opened again, so it might be some kind of plastic snap-in thing that just needs to be forced out. Even if you break it... just glue it back together. It's not like you have much to loose.
Old 10-26-2008, 03:37 AM   #3
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Long shot - but is there a 'hidden' screw under a label?
Old 10-26-2008, 04:09 AM   #4
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Tricks used:

1. tangs and tabs - look carefully for signs of where they might be - usually a rectangular pattern somewhere due to the shape of the mold. The next trick is what size screwdriver is needed to release the tang.

2. sliding tabs - popular in mobile phones.

3. hidden screws (lost popularity ~10 years ago)

Just be careful and very patient.

4. Some items are designed to never be taken apart - in such cases your common 'superglue' is used to create a permanent join. Examples include throw-away power supplies. In such cases, a jeweler's saw and fast curing epoxy are the way to go.
Old 10-26-2008, 07:23 AM   #5
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The marble mouse works to my satisfaction again. Must have been the magical leprechauns

Thanks for your answers, everybody.

(there are no labels to hide screws behind)
Old 04-25-2009, 02:23 AM   #6
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Logitech Marblemouse disassembly

Aside from the four visible screws, there is a fifth under a sticky label. Located almost dead center, a little probing will reveal the hole and the recessed screw beneath it. It takes a very narrow screwdriver to reach it, but having gotten that far the rest isn't too hard to figure out. The case halves pop apart with a very minor bit of effort and snap back together without any broken tabs, hooks, or whatnots.
Old 10-03-2010, 10:02 PM   #7
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That's the slution

Thanks Bloodmane

I have a TBC21 Trackball, I love it.

That center screw was the ticket. Once I knew to look for it, I could see a slight depression in the label, with a cross hairs printed right over it. You need a longer shaft screwdriver, that screw is all the way at the top side of the case. It's at the bottom of a plastic tube that runs from the bottom piece to the top piece, so it won't float around in the innards once it's loose.

Problem I was having was erratic operation from the left button. With the size of my hands, it's usually more ergonomic to press the left button with my index finger and use the next two to roll the ball. My index finger presses right at the front of the button. All of a sudden I was getting erratic operation from the left button if I pressed it that way, but it was ok if I pressed farther back.

Once I got it apart, I sprayed some contact cleaner into the switch, though it probably didn't need it. Then I noticed there was some slight, but noticeable, wear on the bottom of the actual left button (in the top of the case) where it would hit the trip point of the switch. So I mixed a bit of quick set epoxy and put it on the contact spot, trimmed it up before it set. Once it set I put it back together and it works just like new.

Old 07-16-2011, 07:29 PM   #8
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center screw FTW

Glad I found this thread before I really started cranking on the housing to pry it open. I probably would have broken it.

Once I punctured the label and removed the center screw it came right apart. The left main button my mouse was not snapping back after being depressed. Turns out one of the the inner button pivot stems has snapped out its holder. Popped it back in and the main button is working great again.

Last edited by srf21c; 07-16-2011 at 07:33 PM.


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